Iterate Attributes

Helper

On 16/08/2017 at 04:30, xxxxxxxx wrote:

Hello,

I am trying to iterate trough tag attributes with a script:

import c4d
def main() :
if op is None: return
for tag in op.GetTags() :
      bc = tag.GetDataInstance()
      for value in bc:
          print value

if __name__=='__main__':
main()

It all goes well until it comes to some "unsupported" attributes, likes of Weight tag, Visual Selector tag...
It gives an error with such tags stating:
"AttributeError: Parameter value not accessible (object unknown in Python)"

I really have no idea how to bypass this. Is there a better way of doing this? Or am I missing something obvious?

Thanks,

Sandi

Helper

On 16/08/2017 at 05:09, xxxxxxxx wrote:

I guess this thread will answerd your ask https://developers.maxon.net/forum/topic/5936/6027_how-to-list-keys-for-a-basecontainer&PID;=25407#25407

Helper

On 16/08/2017 at 08:13, xxxxxxxx wrote:

That did it, thank you!

Helper

On 17/08/2017 at 03:15, xxxxxxxx wrote:

The AttributeError stating "Parameter value not accessible (object unknown in Python)" means the Python API doesn't support the data type for the parameter.
So no data value can be given for such parameter.

To bypass this error you can catch and process it like this:

def main() :
    if op is None:
        return
  
    for tag in op.GetTags() :
        bc = tag.GetDataInstance()
        print tag
  
        # Loops through parameters
        dataLen = len(bc)
        for dataIdx in xrange(dataLen) :
            dataID = bc.GetIndexId(dataIdx)    # Retrieves parameter ID for the given index
            dataType = bc.GetType(dataID)      # Retrieves parameter data type
            try:
                data = bc[dataID]              # Tries tro get parameter data
            except AttributeError:
                print dataID, dataType, "Data not supported"
                continue
  
            # Prints information on parameter data
            print dataID, dataType, data

Helper

On 17/08/2017 at 05:59, xxxxxxxx wrote:

That's even more elegant, thank you Yannick!